Definitions for earthshakingˈɜrθˌʃeɪ kɪŋ
Random House Webster's College Dictionary
imperiling, challenging, or significantly affecting basic beliefs, attitudes, relationships, etc.
Origin of earthshaking:
loud enough to shake the very earth
earthshaking, world-shaking, world-shattering(adj)
sufficiently significant to affect the whole world
"earthshaking proposals"; "the contest was no world-shaking affair"; "the conversation...could hardly be called world-shattering"
Of global consequence or importance
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